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Merck
CN
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文件

339792

Sigma-Aldrich

3,4-二丁氧基-3-环丁烯-1,2-二酮

98%

别名:

方酸二正丁酯

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About This Item

线性分子式:
[CH3(CH2)3O]2C4(=O)2
CAS号:
2892-62-8
分子量:
226.27
MDL编号:
MFCD00037150
UNSPSC代码:
12352100
PubChem化学物质编号:
24860681
NACRES:
NA.22

质量水平

200

检测方案

98%

形式

liquid

折射率

n20/D 1.494 (lit.)

bp

139 °C/0.5 mmHg (lit.)

密度

1.047 g/mL at 25 °C (lit.)

SMILES字符串

CCCCOC1=C(OCCCC)C(=O)C1=O

InChI

1S/C12H18O4/c1-3-5-7-15-11-9(13)10(14)12(11)16-8-6-4-2/h3-8H2,1-2H3

InChI key

XBRWELTXMQSEIN-UHFFFAOYSA-N

相关类别

一般描述

3,4-二丁氧基-3-环丁烯-1,2-二酮是方酸的二烷基酯。

应用

3,4-二丁氧基-3-环丁烯-1,2-二酮用于合成新型半方酸染料，可用于在水性介质中进行高选择性Hg2+传感。它也用于合成3-丁氧基-4-(1,3,3-三甲基-2,3-二氢-1H-2-吲哚基亚甲基)-3-环丁烯-1,2-二酮的中间体方酸染料。

象形图

Exclamation mark
GHS07

警示用语：

Warning

危险分类

Eye Irrit. 2 - Skin Irrit. 2 - Skin Sens. 1 - STOT SE 3

靶器官

Respiratory system

WGK

WGK 3

闪点(°F)

closed cup

闪点(°C)

closed cup

个人防护装备

Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter

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A 57-year-old Japanese male patient with an 18-year history of discoid lupus erythematosus (DLE) presented with alopecia on his scalp, and was clinically diagnosed to have alopecia areata. He was started on topical immunotherapy with squaric acid dibutylester (SADBE) for
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To study the effect of fexofenadine on extensive alopecia areata (AA), we evaluated retrospectively 121 patients with AA having alopecia in more than 50% of the scalp and followed them for at least 6 months. Patients were treated by immunotherapy
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Topical immunotherapy is effective for severe alopecia areata. However, there are patients with alopecia areata refractory to topical immunotherapy alone. We tried SADBE (squaric acid dibutylester) topical immunotherapy combined with topical dry ice cryotherapy, carpronium chloride (a parasympathetic nerve stimulant)
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